Separate hydraulic systems arranged in parallel, especially for a ship's steering apparatus

In order that separate hydraulic systems A,B, e.g. in a ship's steering apparatus, may be simultaneously operated it is necessary to equalize the pressure between the pumps 10, 11 in the respective systems A,B. Preferably, this is accomplished by interposing piston and cylinder assembly 128 bet...

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Bibliographische Detailangaben
1. Verfasser:	KENNEDY, JOHN STRAUGHAN
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR FLUID-PRESSURE ACTUATORS FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS HEATING HYDRAULICS OR PNEUMATICS IN GENERAL LIGHTING MARINE PROPULSION OR STEERING MECHANICAL ENGINEERING PERFORMING OPERATIONS RELATED EQUIPMENT SHIPS OR OTHER WATERBORNE VESSELS SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	In order that separate hydraulic systems A,B, e.g. in a ship's steering apparatus, may be simultaneously operated it is necessary to equalize the pressure between the pumps 10, 11 in the respective systems A,B. Preferably, this is accomplished by interposing piston and cylinder assembly 128 between respective pump actuating rods 141, 143. During steering, pressures of respective systems A,B, are applied to assembly 128 at inlets 122, 121. If there is an imbalance in said pressures, piston 123 and trunnion 124 move, thereby altering the effective length of lever 125 until the stroke of pump 10 is equal to that of pump 11. Other methods of equalising pressure between pumps 10, 11 include providing pressure sensitive control valves or spill valves between each side of each system A,B.